Light-distribution chart.



' To all whom it may concern:

andt age indicated, will produce the result indi acter that may be founddesirable.

DOLIEB, JB., OF BBIDGEPORT, CONNECTICUT.

men'r-nrsrnmn'rron CHART.

mosaic.

Specification of Letters Patent.

Patented Jo a, 1918.

Application filed August 14, 1916. Serial No. 114,672.

Be it known that I, Hmmir DOLIER, J12, a citizen of the United" States,residing at Bridgeport, county of Fairfield, State of Connecticut, haveinvented an Improvement in Light-Distribution Charts, (Case A,) of whichthe following is a specification.

This invention has for its object to provide a light distribution chartwhich shall display, 1n connection with a set of representations of lampwattage, a set of repre sentations of reflectors, and a set ofrepresentations of results obtainable, 6., indications of difi'erentdegrees of light concentration and direction, said representations beingso arranged as to display, at the intersection of imaginary linesextending throu h a representation of lamp wattage firough arepresentation of a result; a representation of the special reflectorwhich, when used in connection With the lamp Wattcated, z. 6., a specialconcentration and direction of rays of light, and may also displayinformation indications of anIyl charwords, my novel chart enables theuser to select at a glance the proper 1am and reflector to produce, whencombine any required concentration and direction of rays oflight. a A

With the above. and other objects in View,

' I have devised the novel light distribution i chart of which thefollowing description in connection with the accompanying drawing 1, isa specification, reference characters being used to indicate the several'parts:

. The drawing is a plan view of a portion of a light distributionchart'embodying my novel invention. 7 j

10 denotes a card, sheet or'folde'r, which for convenience I will termthe sheet, and

which may be made of any suitable material, 7

as celluloid, paper or textile material and of any preferred shape, asround or angular. By preference, although not necessarily, the sheet isdivided, by lines crossing each other at right angles, into squares. 11denotes a set of representations of lamp wattage; Theserepresentationsmay be in the form of pictures of lamps or of statementsof wattage, as for example-100 watt, or both pictures and statements maybe used, if preother ferred, as shown in the drawing. As 10, 15 and 20watt lampsare substantially the same in configuration and arrangement offila- '500 watt lamps are shown, as these lamps differ more or less inconfiguration and in the arrangement of the filament.

12 denotes a .set of representations of results obtainable in theconcentration and direction of rays of light. These representationsmaybe in the form of diagrams indicating difi'erent degrees of lightconcentration, or of words indicating different degrees of lightconcentration, as angle, distributing, extensive, intensive, focusing,&c., or both diagrams; and words may be used if preferred, as shown inthe drawing. In connection with these representations of resultsobtainable, I may or may not use letters and figures indicating themounting height of the lamp above the workin plane. For example, theworking plane is or inarily figured as two feet, six inches above thefloor, and a'standard mounting height, indicated by M, may bearbitrarily fixed at eight feet above theworking plane, and the figuresused in connection w th the letter M indicate the degree ofconcentration of the rays of light at the working plane, thus ment, Ihave grouped them together. Indev I M2 indicates that a lamp in adefinite type of reflector eight feet above the working plane willevenly illuminatethat Worln'ng plane over thexarea of a circle sixteenfeet in diameter, the center of the circle being directly under the tipof the lamp hanging pendant. If greater intensity of light is required,another type of reflectormust be used, which will produce evenillumination over a smaller area; thus, M-l} indicates the workin planeover the area of a circle six feet in iameter, i. e. three-fourths ofthe standard mounting height.

means that the fixtures are Hubbell fixture-s M means porcelain enamel;X means angle position; D means distributing; I means intensive; E meansextensive; F means focusing; A means aluminum finish; the numberindicates the wattageof thelamp; and L, following the number, means heelextension; thus. H)IE'500L would indicate Hubbell fixtures, porcelainenameled, with 'an extensive type of reflector on a 500-watt lamp with aheel extension.

The use of my novel chart is as follows: Having determined the lampwattage to be used, and the'result, i. e. the light concentrationrequired, as indicated by a representation of a result, the operatortraces an imaginary line inward from the selected representation of lampwattage'and from the selected representation of a result, and at theintersection of said imaginary lines will be found a picture orrepresentation with accompanying information indications showing thereflector required to produce-the desired concentration of light fromthe lamp selected. For example, suppose that a 100 watt lamp is to beplaced ten feet above the desired to illustrate.

working plane and that an aluminum finished reflector giving intensiveconcentration of lights is required, the operator traces an imaginaryline inward. from the representation of lamp wattage specifically indi-'cated by a and from the representation of a result indicated by b, andat the intersection of said imaginary lines he will find a picture orrepresentation of the reflector, specifically indicated by a, requiredto produce the desired result with the selected lamp. It will of coursevbe understood that the size of the chart islim'ited only by the numberof repfesentations'of lamp wattage, results obtainable and reflectorsthat it is For the purposes of this specification, I have illustrated alimited number only of representations of lamp wattage, resultsobtainable and reflectors. It

. will furthermore be understood that, the

sizes and styles of lamps are standardized and that the reflectors arescientifically designed to produce predetermined results from standardlamps. 'By the use of scientifically designed reflectors. properlylocated with relation to the lamp filament. the light from the lamp isre-directed so -as to cause These representations of reflectors asurface or working plane to be evenly illuminated over a known area, thearea depending of course upon the type of reflector and the height ofthe lamp above the working plane.

Having thus described my invention, I

will be indicated at the intersection of right angular ly disposedimaginary lines leading from any of the indicated hght intensities andthe selected indlcatlon of light concentrat-ion.

2. A chart of the character described comprising a row of indications ofdifferent light concentrations, a row of indications of different lightintensities arranged at right angles to the row of light concentrations,

and a plurality of rows of indications of devices for obtaining thevarious indicated light concentrations when employed in connection withthe different indicated light intensities, said indications of devicesbeing so arranged that a device capable of producing a selected lightconcentration will be indicated at the intersection of right angularlydisposed imaginary lines leading from'any of the indicated lightintensities and the selected indication of light concentration.

3. A chart of the character described comprising a vertically disposedset of different light concentrations, a horizontally disposed set ofindications of different light intensities, and a plurality ofhorizontally disposed sets of indications of devices for ,obtaining thevarious indicated light concentrations when employed with the difierentindicated light intensities, the sets of in dications of'devices beingarranged in alinement with the respective indications of lightconcentrations and indications of light intensities, whereby a devicecapable of producing a selected light concentration will be indicated atthe intersection of right angularly disposed imaginary lines leadingfrom any of the indicated light intensities and the selected indicationof light concentration.

4. A chart of the-character described comprising a set of indications ofditferent fixed light concentrations, a set of indications of differentfixed light intensities. and a pluralityof indications of devices forobtaining the various indicated light concentrations when employed withthe different indicated being so arranged that a device capable of fixedlight concentrations, a set of indications of diflferent fixed lightintensities, and

' a plurality of indications of devices for obtaining the variousindicated light concentrations when employed with the difierentindicated light intensities, said indications of devices being soarranged that a device capable of producing a selected lightconcentration will be indicated at the intersection of right angularlydisposed imaginary lines leading from any of the indicated lightintensities and the selected indication of light concentration, andmeans for indicating variations in the fixed formof the devices to beselected.

6. A chart of the character described comprising a set of indications ofdifierent fixed light concentrations, a set of indications of difi'erentfixed light intensities, and a plurality of indications of devices forobtaining thevarious indicated light concen-. trations when employedwith the dlfierent,

indicated light intensities, said indications of devices being soarranged that a device capable of producing a selected lightconcentration will be indicated at the intersectionl of right angularl ydisposed imaginary lines leading from any of the indicated lightintensities and the selected indication of light concentration, meansfor indicating variations: in the fixed light concentrations, and meansfor indicating variations in the fixed form of the devices to beselected.

In testimony whereof I aflix my signature.

HENRY DOLIER, JBP.

